/Engine/Source/Runtime/TypedElementRuntime/Public/Elements/Framework/TypedElementSelectionSet.h
Get a normalized version of the given element list that can be used to perform operations like gizmo manipulation, deletion, copying, etc. This will do things like expand out groups, and resolve any parent<->child elements so that duplication operations aren't performed on both the parent and the child.
void GetNormalizedElementList ( FTypedElementListConstRef InElementList, const [FTypedElementSelectionNormalizationOptions](API\Runtime\TypedElementRuntime\Elements\Framework\FTypedElementSel-_1) & InNormalizationOptions, FTypedElementListRef OutNormalizedElements ) const